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PCIe* Statistics Control #2 - GSCL_2 (05B14h; R) — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 405
Clock counter 20 Counts GIO cycles.
Bad TLP from LL 21 Each cycle, the counter increases by one, if bad TLP is received
(bad crc, error reported by AL, misplaced special char, reset in
thI of received tlp).
Header dwords of Transaction layer packet
transmitted.
25 Only TLP, each 125 MHz cycle the counter increases by one (1 dw
of header) or 2 (2 dw of header).
Counted: completion, memory, message (not replied)
Header dwords of Transaction layer packet
received.
26 Only TLP, each 125 MHz cycle the counter increases by one (1 dw
of header) or 2 (2 dw of header).
Counted: completion, memory, message
Transaction layer stalls transmitting due to
lack of flow control credits of the next part.
27 The counter counts the number of times Transaction layer Stop
transmitting because of this (per packet).
Counted: completion, memory, message
Retransmitted packets. 28 The Counter increases for each retransmitted packet.
Counted: completion, memory, message
Stall due to retry buffer full 29 The counter counts the number of times Transaction layer stop
transmitting because Retry buffer is full (per packet).
Counted: completion, memory, message
Retry buffer is under threshold 2A Threshold specified by software, Retry buffer is under threshold
per packet.
Counted: completion, memory, message
PRH (posted request header) flow control
credits (of the next part) below threshold
2B Threshold specified by software.
The counter increases each time number of the specific flow
control credits is lower than threshold.
Counted: According to credit type
PRD (posted request data) flow control
credits (of the next part) below threshold
2C
NPRH (non posted request header) flow
control credits (of the next part) below
threshold
2D
CPLH (completion header) flow control
credits (of the next part) below threshold
2E
CPLD (completion data) flow control credits
(of the next part) below threshold
2F
PRH (posted request header) flow control
credits (of local part) get to 0.
30 Threshold specified by software.
The counter increases each time number of the specific flow
control credits is get the value 0 (The period that the credit is 0
not counted).
Counted: According to credit type
NPRH (non posted request header) flow
control credits (of local part) get to 0.
31
PRD (posted request data) flow control
credits (of local part) get to 0.
32
NPRD (non posted request data) flow
control credits (of local part) get to 0.
33
Dwords of Transaction layer packet
received, include payload and header.
34 Each 125 MHz cycle the counter increases by one (1 dw) or 2 (2
dw).
Counted: completion, memory, message, I/O, config
Messages packets received 35 Each 125 MHz cycle the counter increases by one
Counted: messages (only good)
Received packets to func_logic. 36 Each 125 MHz cycle the counter increases by one
Counted: memory, I/O, config (only good)